Liquid cooling radiator based on a working medium capable of liquid-liquid phase separation

Abstract

A liquid cooling radiator based on a working medium capable of liquid-liquid phase separation includes a cooling fan, a micro liquid pump, a mixing pipe and a heat exchanger which are connected in sequence via a plastic tube. The liquid cooling radiator uses a solution capable of liquid-liquid phase separation at a lower critical separation temperature as a working medium, and is sealed after filling the solution into pipelines of the liquid cooling radiator. By replacing a working medium of the active CPU liquid cooling radiator, a heat dissipation performance in a limited space under a condition of a same pump power consumption, is greatly improved, a viscosity of the working medium in a heat-carrying state is reduced to decrease a flow resistance, which realizes both an enhancement of heat transfer and a reduction of flow resistance.

What is claimed is: 
     
         1 . A liquid cooling radiator based on a working medium capable of liquid-liquid phase separation, comprising a cooling fan, a micro liquid pump, a mixing pipe and a heat exchanger which are connected in sequence via a plastic tube, wherein the liquid cooling radiator employs a solution capable of liquid-liquid phase separation at a lower critical separation temperature as a working medium, and the liquid cooling radiator is sealed after filling the solution into pipelines of the liquid cooling radiator. 
     
     
         2 . The liquid cooling radiator according to  claim 1 , wherein the liquid cooling radiator is configured for heat dissipation of CPU or GPU, when the micro liquid pump is activated, the solution in the pipelines of the liquid cooling radiator flows into the heat exchanger through an inlet of the heat exchanger and is in a stable single-phase state, by convective heat transfer with internal extended surfaces of the heat exchanger, the solution is heated by the internal extended surfaces of the heat exchanger, and a temperature of the solution rapidly raises to the lower critical separation temperature so as to cause a liquid-liquid phase separation, during which heat is absorbed. 
     
     
         3 . The liquid cooling radiator according to  claim 2 , wherein the solution which has absorbed heat and taken place the liquid-liquid phase separation flows out of the heat exchanger through an outlet of the heat exchanger, and enters the cooling fan through the plastic tube which is able to withstand pressure. 
     
     
         4 . The liquid cooling radiator according to  claim 3 , wherein the solution in liquid-liquid phase separation state flows out of an outlet of the cooling fan, is pressurized by the micro liquid pump and flows through the mixing pipe with a length of 1.5 cm, the solution in liquid-liquid phase separation state is sufficiently miscible in the mixing pipe to reach the single-phase state before the liquid-liquid phase separation. 
     
     
         5 . The liquid cooling radiator according to  claim 4 , wherein the solution in the single-phase state flows out of the mixing pipe and is again introduced into the heat exchanger via the plastic tube for a next cycle. 
     
     
         6 . The liquid cooling radiator according to  claim 5 , wherein a temperature of the solution flowing into the heat exchanger is lower than the lower critical separation temperature of the solution. 
     
     
         7 . The liquid cooling radiator according to  claim 1 , wherein internal wall surfaces of the heat exchanger and the cooling fan are sprayed and coated with a nanometer silicon nitride. 
     
     
         8 . The liquid cooling radiator according to  claim 1 , wherein inner walls of the micro liquid pump and the plastic tube which is able to withstand pressure are sprayed and coated with polytetrafluoroethylene.